Recent short-range forecasts from the Finnish Meteorological Institute and ECMWF ensembles indicate a daytime peak of 23–26°C in Helsinki on July 13, driven by a shift to warmer southerly flow, reduced cloud cover, and light winds allowing greater solar heating. This contrasts with cooler maritime conditions earlier in July that capped highs near 20°C. Trader sentiment clusters tightly around 24–26°C outcomes because ensemble spread remains modest on timing of any showers or frontal passage, while historical July averages near 21°C provide baseline context. Updated model runs and official briefings through July 12 will further refine the implied probabilities ahead of resolution based on Helsinki-Vantaa observations.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Helsinki on July 13?
20°C 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$86,501 Vol.
$86,501 Vol.
16°C or below
No
17°C
No
18°C
No
19°C
No
20°C
Yes
21°C
No
22°C
No
23°C
No
24°C
No
25°C
No
26°C or higher
No
20°C 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$86,501 Vol.
$86,501 Vol.
16°C or below
No
17°C
No
18°C
No
19°C
No
20°C
Yes
21°C
No
22°C
No
23°C
No
24°C
No
25°C
No
26°C or higher
No
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Jul 11, 2026, 12:03 AM ET
Resolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Resolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent short-range forecasts from the Finnish Meteorological Institute and ECMWF ensembles indicate a daytime peak of 23–26°C in Helsinki on July 13, driven by a shift to warmer southerly flow, reduced cloud cover, and light winds allowing greater solar heating. This contrasts with cooler maritime conditions earlier in July that capped highs near 20°C. Trader sentiment clusters tightly around 24–26°C outcomes because ensemble spread remains modest on timing of any showers or frontal passage, while historical July averages near 21°C provide baseline context. Updated model runs and official briefings through July 12 will further refine the implied probabilities ahead of resolution based on Helsinki-Vantaa observations.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions